Materials Literature
按标题、摘要、年份、主题和来源检索公开元数据。结果保留作者、摘要、分类与原始来源链接。
The magnetizations, magnetic susceptibilities, and specific heats of both stoichiometric and nonstoichiometric single crystals GdAs are measured at temperatures 1.7\ensuremath{\le}T\ensuremath{\le}300 K and magnetic fields 0\ensuremath{\le}H\ensuremath{\le}24 T. A systematic comparison between the magnetic behavior of…
${\mathrm{Tm}}^{3+}$ doped germanate, tellurite and heavy-metal fluoride glasses were prepared and their upconversion luminescence spectra were measured to investigate the effect of the host glass on the branching ratios, \ensuremath{\beta} of $^{1}$${\mathit{D}}_{2}$${\ensuremath{\rightarrow}}^{3}$${\mathit{H}}_{6}$…
The frequency response of the dielectric constant (∊r), dielectric loss (tanδ) and impedance (Z) of Potassium acid pthalate (KAP) single crystals, monitored along the polar axis, is characterised by the presence of strong mechanical resonances, in the 50-200 kHz region. The observed resonance behaviour, which is depen…
A possible candidate as an environmentally friendly nonwoven fabric is one that can be formed from the thermal calendering of a cotton/cellulose acetate blend. Our results focus on biodegradable properties of the fibers as well as tensile properties of the fabric. Cotton, which is a comfortable, absorbent, biodegradab…
The influences of various reaction parameters (e.g. temperature, time, type and concentration of polyol, and swelling agent) on the extent of liquefaction of the wood meal in polyol, and the properties of the liquefied wood-polyol mixtures have been evaluated. The residue % decreases significantly with the increase of…
Lithium oxide is a possible candidate for a breeder blanket material in fusion reactors. Tritium is generated in the material, which can be extracted and fed into the fusion reactor to help sustain the fusion reaction. Experimental studies have shown the extraction rate is controlled by diffusion of tritium in the bul…
Presents a hyperbranched polymer, a hydroxyl functional aliphatic polyester which consists of a polyalcohol core from which branches extend, forming a core‐shell structure with a large number of hydroxyl groups at its peripheral surface. It is polydisperse and consists, apart from the main core/shell fraction, of a mi…
500-kV XLPE-insulated cable with an insulation thickness of 27 mm has been developed for long-distance transmission lines. Basic studies on 500-kV XLPE cable have shown that contaminants in the insulation may be the factor determining electrical performance. This hypothesis is justified by the good correlation obtaine…
Formate is the major source of C1 units in many species of the genus Clostridium. In this study we have cloned and characterized the genes encoding pyruvate formate-lyase and its activating enzyme of Clostridium pasteurianum. The genetic and transcriptional organizations of the genes and the high level of homology exh…
For two compounds of the thiobenzoate series, the Sc*α phase has been studied. For the first time to our knowledge, its helicity is revealed, by observation of very thin liquid crystal drops. Helical pitch measurements have been performed, and the pitch variations versus temperature studied. The pitch is very small fo…
Abstract Combined LC‐polymers possess the structural properties of both LC main chain and LC side chain polymers. Beneath this structural speciality, their broad LC‐phases and their polymorphism (different smectic phases and one nematic phase as a function of temperature) make them interesting. Crucial to an understan…
An apparatus is described for the measurement of second-order nonlinear optical properties via hyper-Rayleigh scattering with 1 cm−1 spectral resolution of the scattered light. The setup allows a complete investigation of the polarization dependence of the second-harmonic scattered light. The combination of good spect…
Many problems in the modelling of materials call for a synthesis of approaches used at both the atomistic and the continuum levels. One notable implementation of this type of strategy is in the construction of local constitutive relations which serve to provide a microscopic underpinning for the energetics of phenomen…
Coordination of ethylenediaminetetraacetic acid (EDTA) with europium(III) has been studied at different concentrations in solution using 7F0 → 5D0 excitation spectroscopy and excited-state lifetime measurements. EDTA forms with Eu(III) ion three different species in equimolar solutions at room temperature. At low pH v…
During the 1970s, reactor safety authorities developed increasing interest in methods for accurately predicting the extent of hazards associated with severe accidents in light water reactors (LWRs). In response to these concerns, out-of-pile experimental projects were initiated by the U.S. Nuclear Regulatory Commissio…
The dependence of Ni Curie temperature, ${\mathit{T}}_{\mathit{C}}$, on the Ni thickness in Co-Ni and Ag-Ni multilayers is reported. It is shown that ${\mathit{T}}_{\mathit{C}}$ increases 60 \ifmmode^\circ\else\textdegree\fi{}C for the Co-Ni samples, as the Ni thickness decreases from 100 to 50 \AA{}. The difference i…
The phase separation behavior and the morphology of polyetherimide (PEI)-modified diglycidyl ether of bisphenol A (DGEBA) epoxy resin were studied using scanning electron microscopy and light scattering. Reaction kinetics, cloud point and onset of gelation were determined by differential scanning calorimeter, optical…
The low-temperature specific heat of $\ensuremath{\kappa}$-${(\mathrm{B}\mathrm{E}\mathrm{D}\mathrm{T}\ensuremath{-}\mathrm{T}\mathrm{T}\mathrm{F})}_{2}$X ($X=\mathrm{Cu}[\mathrm{N}{(\mathrm{CN})}_{2}]\mathrm{Cl} \mathrm{and} \mathrm{Cu}[\mathrm{N}{(\mathrm{CN})}_{2}]\mathrm{Br}$) and $\ensuremath{\kappa}\ensuremath{-…
We have developed a new method for fabrication of microstructures. Using a Si 3 N 4 membrane with small windows as a mask, a metal film with fine structure is vacuum deposited directly onto a substrate. By means of piezoelectric actuators which slide the mask on the substrate, we have fabricated an array of Al/AlO x /…
We report on a systematic study of the thermodynamic superconducting properties on high-quality crystals of the quasi-two-dimensional (quasi-2D) organic superconductor $\ensuremath{\kappa}$-${(\mathrm{B}\mathrm{E}\mathrm{D}\mathrm{T}\ensuremath{-}\mathrm{T}\mathrm{T}\mathrm{F})}_{2}$${\mathrm{I}}_{3}$. Low-field magne…